Portland, OR Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 46 °F 8 °C Feb 43 °F 6 °C Mar 54 °F 12 °C Apr 59 °F 15 °C May 68 °F 20 °C Jun 72 °F 22 °C Jul 75 °F 24 °C Aug 77 °F 25 °C Sep 68 °F 20 °C Oct 59 °F 15 °C Nov 52 °F 11 °C Dec 46 °F 8 °C Humidity Jan 82% Feb 80% Mar 64% Apr 72% May 64% Jun 61% Jul 62% Aug 62% Sep 75% Oct 72% Nov 78% Dec 84% Rain Jan 45mm Feb 67mm Mar 27mm Apr 46mm May 32mm Jun 21mm Jul 15mm Aug 13mm Sep 70mm Oct 37mm Nov 24mm Dec 49mm Clouds Jan 69% Feb 80% Mar 42% Apr 70% May 45% Jun 38% Jul 34% Aug 29% Sep 53% Oct 38% Nov 58% Dec 72% Air quality US AQI Jan 18 Feb 21 Mar 20 Apr 16 May 21 Jun 13 Jul 20 Aug 28 Sep 21 Oct 28 Nov 41 Dec 31 Sun Jan 1UVI Feb 2UVI Mar 3UVI Apr 4UVI May 5UVI Jun 7UVI Jul 7UVI Aug 6UVI Sep 5UVI Oct 3UVI Nov 2UVI Dec 1UVI
